US metal handy box and 4 in square box: size, depth, cubic inches, cover ears — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/metal-boxes-us/ (sheet CC BY 4.0) Basis: Hubbell RACO and ABB Steel City spec sheets; only printed numbers Catalog version: 2026-10-20 Sizes: see table below - US steel handy (utility) boxes and 4 in square boxes, 1-1/2 and 2-1/8 in deep, with the covers and rings that people make mud-ring and spacer adapters for. - 'Actual depth' is the depth the Hubbell sheet prints in addition to the nominal one; welded boxes with clamps print a larger actual depth. Values are as printed on the maker sheets; the RACO 8670 sheet's labels are out of order, so only width and depth are given. - The 2-23/32 in ear spacing is printed for the Steel City covers and rings (8-32 tapped ears), not for the box itself. Box mounting hole positions, the four ring screw positions and knockout outlines are in drawings that could not be read: no file. - The device screw template on the device box page (3-9/32 in) applies to a handy box and to a one-device ring on a 4 in square box. parameter value 4 in square, drawn, 1-1/2 in deep (RACO 191) 21.0 cu in; 4 x 4 in; actual depth 1.563 in 4 in square, welded, 1-1/2 in deep, 2-gang (RACO 8213) 21.0 cu in; actual 4.007 x 4.039 x 1.932 in (with clamps) 4 in square, drawn, 2-1/8 in deep (RACO 683SP) 30.3 cu in; 4 x 4 in; actual depth 2.188 in 4 in square, welded, 2-1/8 in deep (RACO 232) 30.3 cu in; 4 x 4 in; actual depth 2.434 in 4 x 2 in handy box, welded, 2-1/8 in deep (RACO 8670) 16.5 cu in; 4.00 in wide; depth 2-1/8 in 4 in square cover, 1 device, 3/4 in raised (RACO 8773) 5.5 cu in; 4 x 4 in; slots allow 12 degrees of box misalignment 4 in square cover, 1 in raised (Steel City 52C31) 5.8 cu in; tapped ears on 2-23/32 in centres 4 in square ring, 1/4 in raised (Steel City 401-CS) 1 cu in; 3-1/2 in opening; ears tapped 8-32 on 2-23/32 in centres device screws in a handy box or square-box ring 3-9/32 in (83.3 mm) apart (see the device box page) box mounting holes, ring screw positions, KO sizes, wall thickness drawings only: not printed as numbers, not modelled Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Hubbell RACO: 191 4 in square box, drawn, 1-1/2 in deep (spec sheet) — web — Publisher's page; dimensions are facts — https://hubbellcdn.com/specsheet/RACO-191-SPEC-EN.pdf - Hubbell RACO: 8213 4 in square box, welded, 1-1/2 in deep (spec sheet) — web — Publisher's page; dimensions are facts — https://hubbellcdn.com/specsheet/RACO-8213-SPEC-EN.pdf - Hubbell RACO: 683SP 4 in square box, drawn, 2-1/8 in deep (spec sheet) — web — Publisher's page; dimensions are facts — https://hubbellcdn.com/specsheet/RACO-683SP-SPEC-EN.pdf - Hubbell RACO: 232 4 in square box, welded, 2-1/8 in deep (specification sheet) — web — Publisher's page; dimensions are facts — https://www.plumbingsupplyandmore.com/media/product_pdfs/232_Specification_Sheet.pdf - Hubbell RACO: 8773 4 in square cover, 1 device, 3/4 in raised (spec sheet) — web — Publisher's page; dimensions are facts — https://hubbellcdn.com/specsheet/RACO-8773-SPEC-EN.pdf - Hubbell RACO: 8670 4 x 2 in handy box, welded, 2-1/8 in deep (spec sheet) — web — Publisher's page; dimensions are facts — https://hubbellcdn.com/specsheet/8670.pdf - ABB (Steel City): 52C31 4 in square cover, 1 in raised, tapped ears on 2-23/32 in centres — web — Publisher's page; dimensions are facts — https://crescentelectric.com/electrical-boxes/electrical-box-covers/square-box-cover-4-inch-square-x-1-inch-raised-pre-galvanized-steel-center-blanked-with-tapped-ears-on-2-2332-inches-centers - ABB (Steel City): 401-CS 4 in square 1/4 in raised ring, 3-1/2 in opening, ears 8-32 on 2-23/32 in — web — Publisher's page; dimensions are facts — https://empower.abb.com/ecatalog/ec/EN_NA/p/401-CS No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=metal-boxes-us